Spinning device



Feb. 27, 1968 V .1. RAJNOHA ETAL 3,370,413

SPINNING DEVICE Filed July 20, 1966 my, I.

I v ah VII/II/l/l/l/I/I/I INVENTORfi United States Patent Ofi ice 3,37%,413 Patented Feb. 27, 1958 3,379,413 SEINNING DEVICE Jaroslav Rajnoha, Tyuiste 112d Qrlici, Miloslav Kubovy, Bolni Dohrouc, and Vitalij Zestltov, Usti uad' Griici, zechoslavakia, assignors to Vyzlrurnny Ustav Bavlnarslry Ustin nad Orlici, zechoslovalria Filed July 26, 1956, Ser. No. 566,617 Claims priority, application Czechoslovakia, Nov. 16, 1965, 6,822/65 12 Claims. (Cl. 5758.95)

The present invention relates to a spinning device, and more particularly to a device for the continuous spindleless spinning of textile fibers and having a rotary spinning chamber and a fiber separator located in the same for directing fibers onto the surface of the rotary spinning chamber and for separating the finished spun yarn from the fed fibers.

in a known spinning device of this type, a circular separator is disposed in the rotary spinning chamber and has a guide surface disposed at right angles to the axis of rotation of the spinning chamber, while forming a considerable angle with the axis of the inlet channel through which the fibers are fed into the spinning device after having been combed out. Due to the angle between the feeding direction and the guide surface of the separator, the direction of the fed fibers is abruptly changed as they arrive in the region of the separator and spinning chamher. This is undesirable, since the parallel position of the combed fibers is disturbed which impairs the quality of the spun yarn.

The fed fibers move in a distributing gap, which is formed between the guide surface of the separator and a confronting surface of a wall, toward the annular collecting surface of the spinning chamber, and in the devices of the prior art, the gap is frequently clogged by the fibers..Furtherrnore, the fibers are not directed onto the collecting surface of the spinning chamber in the optimal manner.

It is one object of the invention to overcome the disadvantages of known spinning devices, and to provide a spinning device in which the fibers are supplied in parallel condition to the collecting surface of the rotary spinning chamber without clogg ng the spinning device.

Another object of the invention is to supply the fed fibers to the collecting surface of the spinning chamber through a gap which widens in radial direction.

Another object of the invention is to provide an elongated inlet opening for the fed fibers whose axial distance from the confronting surface of the separator increases in radial direction.

With these objects in view, the present invention is concorned with an improved spinning device of the type in which the fed fibers are supplied into the outer part of a rotary spinning chamber, while the spun yarn is discharged through an outlet passage located in the axis of the spinning chamber.

One embodiment of the invention comprises a rotary spinning chamber having an axis of rotation and an aperture; and stationary means including a closure part closing the aperture and a separator part located in the spinning chamber.

In accordance with the invention, the closure part and the separator part have confronting, preferably frustoconical surfaces forming a gap outwardly widening in radial direction and leading to the collecting surface of the spinning chamber. The stationary means are formed with an inlet channel having an inlet opening in the gap, and with an outlet passage located in the axis of rotation of the spinning chamber and opening on the separator part in the spinning chamber. The inlet opening of the inlet channel, through which combed fibers are fed, is

elongated in radial direction and extends on one side of the gap on the respective surface of the closure part so that the axial distances between the inlet opening and the confronting surface of the separator part increase outwardly in radial direction.

In the preferred embodiment of the invention, the confronting surfaces of the closure part and separator part are frustoconical surfaces slanted at different angles to the axis of rotation of the spinning chamber, the portion of the frustoconical surface of the closure part in which the inlet opening is located, being inclined at a greater angle to the axis. The spinning chamber has a preferably frustoconical fiber guiding surface slanted to the axis of rotation and surrounding the aforesaid surface of the closure part to form a continuation of the same. However, the fiber guiding surface is inclined to the axis of rotation a smaller angle than the frustoconical surface of the closure part so that the same bulges away from the fiber guiding surface.

In accordance with the invention, the inlet channel is located in a plane which is parallel with the axis of the spinning chamber and with the outlet passage for spun yarn. The distance between the separator and the inlet opening increases toward the fiber guiding surface of the spinning chamber in such a manner that the surface of the closure part which defines with the confronting surface of the separator part an annular inlet gap, is bulged in the direction away from the spinning chamber, that is in the direction of the yarn traveling through the outlet passage which extends'through the centers of the separator part and closure part.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, Will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

FIG. 1 is a sectional view illustrating a spinning device according to the invention;

FIG. 2 is a sectional, partly schematic, fragmentary view taken on line 2-2 in FIG. 1; and

FIG. 3 is a fragmentary, perspective view, partially in section, illustrating a stationary closure part of the device.

Referring now to the drawings, a spinning chamber 1 is carried by a shaft 2 mounted for rotation in bearings 3 and 4 on a frame Wall 5 of a spinning machine. A pulley 2a is secured to the end of shaft 2 and is driven by a drive belt, not shown, common to a row of spinning devices.

The spinning chamber 1 has a frustoconical portion 8 provided with discharge openings 9 through which air is ejected during rotation of the spinning chamber. Another frusloconical wall 6 converges from the largest diameter portion of spinning chamber 1 toward the axis of the same, and has a short cylindrical portion 10 surrounding a large central aperture 10a leading into the spinning chamber. 1

The spinning chamber 1 is partly surrounded by a cover or casing 12 which is open at the bottom for the discharge of air.

Stationary means, generally indicated by reference numeral 39, are secured to casing 12 and carried by the frame 5. The stationary means include a closure part 114, best seen in FIG. 3, having a central portion closing aperture 10a of the spinning chamber by a frustoconical surface 13 which bulges away from the spinning cham= her, a frustoconical separator part 17, and a central outlet tube 15 defining an outlet passage for the yarn 16 3 located in the axis of the spinning chamber and gradually widening away from the spinning chamber.

The frustoconical surface 13 of closure part 14 confronts a frustoconical surface 23 of separator part 17 and forms with the same an annular gap 27 which widens outwardly in radial direction due to the fact that the surface i3 is slanted to the axis of rotation of the spinning chamber, a first angle B ranging from 4089 but which is greater than the second angle A ranging then from 3988.

The frustoconical inner surface 11 of wall 6 of the spinning chamber, is slanted to the axis of rotation a third angle C which is smaller than the first angle B, and is ranging from 3988. Surface 11 surrounds surface 13 and forms a continuation of the same.

The stationary means 39 further include a part 29 which is formed with a cavity 28 in which a feed roller 18, and a combing roller 19 are located. A sliver, rovin or rope of fibers 2t) enters the inlet 26a, is engaged by the teeth of feeding roller 13, and transported into the region of combing roller 19 which orients the fibers in parallel directions, and transports the same out of the circular portion 21 of cavity 28 into the inlet channel 22 which extends in tangential direction from combing roller 19, and is located in a plane parallel to the axis of rotation of spinning chamber 1.

Inlet channel 22 forms an inlet opening 22:! on surface 13 of closure part 14, see also FIG. 3, and since inlet opening 22a is elongated in radial direction, it extends over a great part of the annular gap 27 between the confronting surfaces 13 and 23, as best seen in FIG. 1. Consequently, the axial distances between separator 17, 23 and inlet opening 22.4 increase outwardly in radial direction toward the fiber guiding surface 11 of wall 6 of the spinning chamber on which fibers supplied through inlet channel 22, inlet opening 22a, and gap 27 slide toward the inner collecting surface 7 during rotation of the spinning chamber under the action of the centrifugal force. A yarn 16 is spun in the usual manner, and guided through the outlet tube 15 to a pair of transporting rollers 24 which deliver the yarn to a bobbin 25.

In the preferred embodiments of the invention, surface 23 of separator 17 defines with a plane perpendicular to the axis of rotation of spinning chamber 1, an angle within the range from to and with the axis of rotation, 'a complement angle within the range from 95 During operation, the fibers are separated and oriented by the combing roller 20, delivered through inlet passage 22 and inlet opening 22a into gap 27, and move in the widening gap onto the rotating surface 11 on which they slide to the col ecting surface 7 which has the greatest diameter of the spinning chamber, and on which the yarn is formed. The yarnportion between collecting surface 7 and the inner end of tube 15 forms an angle between 80 and 110 with the axis of rotation. The yarn portion between the outer end of outlet tube 15 and take-up rollers 24, forms an angle between 60 and 120 with the axis of rotation of the spinning chamber. The widening annular gap 27 prevents clogging of the fibers supplied through inlet opening 2261.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of spinning devices differing from the types described above.

While the invention has been illustrated and described as embodied in a spinning device provided with an inlet channel opening into an annular outwardly widening gap bounded by diverging frustoconical surfaces slanted to the axis of rotation of the spinning chamber, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and aperture; and stationary means includin. a closure part,

closing said aperture, and a separator part located in said spinning chamber, said closure part and said separator part having confronting surfaces forming a gap outwardly widening in radial direction, said stationary means being formed with an inlet c iannel having an inlet opening in said gap on said confronting surface of said closure part, and with an outlet passage for yarn spun in said spinning chamber having an outlet opening for spun yarn located in said axis of rotation and in said spinning chamber.

2. A spinning device according to claim 1 wherein said inlet opening of said inlet channel is elongated in radial direction and extends on one side of said gap so that the distances between said inlet opening and said confronting surface of said separator part increase outwardly in radial direction.

3. A spinning device according to claim 1 wherein said confronting surface of said separator part is a surface of revolution slanted at a first angle to said axis of rotation, and wherein said confronting surface of said closure part is a surface of revolution slanted to said axis of rotation a second angle greater than said first angle so that the axial distances between said confronting surfaces increase outwardly in radial direction.

4. A spinning device according to claim 1 wherein said confronting surface of said separator part is a surface of revolution slanted at a first angle to said axis of rotation, wherein said confronting surface of said closure part is a surface of revolution slanted to said axis of rotation a second angle greater than said first angle so that the axial distances between said confronting surfaces increase outwardly in radial direction; and wherein said spinning chamber has a fiber guiding surface of revolution slanted to said axis of rotation and surrounding said confronting surface of said closure part to form a continuation of the same.

5. A spinning device according to claim 1 wherein said confronting surface of said separator part is a surface of revolution slanted at a first angle to said axis of rotation, wherein said confronting surface of said closure part is a surface of revolution slanted to said axis of rotation a second angle greater than said first angle so that the axial distance between said confronting surfaces increase outwardly in radial direction; wherein said spinning chamber has a fiber guiding surface of revolution slanted to said axis of rotation and surrounding said confronting surface of said closure part to form a continuation of the same, said fiber guiding surface being inclined to said axis of rotation a smaller angle than said confronting surface of said closure part so that the same bulges away from said fiber guiding surface; and wherein said inlet opening of said inlet channel is elongated in radial direction and extends on one side of said gap so that the distances between said inlet opening and said confronting surface of said separator part increase outwardly in radial direction.

6. A spinning device according to claim 1 wherein said separator part is a frustoconical wall coaxial with said axis of rotation and converging toward said axis in a direction away from said spinning chamber corresponding to the direction of a discharged spun yarn.

7. A spinning device according to claim 1 wherein said confronting surface of said separator part is slanted to the axis of rotation of said spinning chamber an angle between 95 and 85 and converges toward said axis in a direction away from said spinning chamber.

8. A spinning device according to claim 1 wherein said stationary means include a body formed with a cavity communicating with said inlet channel; and comprising feeding roiler means and combing roller means located in said cavity for transporting fibers into and out of said inlet channel.

9. A spinning device according to claim 1 wherein said separator part is a frustoconical wall, wherein said confronting surface is frustoconical and located on the outside of said trustoconical wall, and wherein the surface on the inside of said frustoconical wall is also frustoconical and parallel to said frustoconical confronting surface, said frustoconical surface on the inside of said frustoconical wall facing the interior ofsaid spinning chamber.

10. A spinning device according to claim 1 wherein said spinning chamber has two portions diverging and converging in axial direction and an intermediate portion having the maximum diameter of said spinning chamber and forming inside of the same an annular collecting surface; wherein said stationary means include an outlet tube forming said outlet passage and passing through said separator part and closure part, said outlet tube having an inner end with said outlet opening located in said spinchamber, said inner end of said outlet tube and said coilecting surface of said spinning chamber being arranged and constructed so that a spun yarn extending from said collecting surface to said inner end of said outlet tuhe and through the same, defines an angle between 80 and 110 with the axis of rotation of said spinning chamber.

11. A spinning device according to claim 10 comprising take-up means for a spun yarn discharged from the other end of said outlet tube, said take-up means and said other end of said outlet tube being arranged and constructed so that the yarn passing from said outlet tube to said take-up means defines an angle between and with the axis of rotation of said spinning chamber and with the axis of said outlet tube.

12. A spinning device according to claim 1 wherein said stationary means include an outlet tube passing through said closure part and separator part and having an inner end located in said spinning chamber and forming said outlet opening for a spun yarn, and an outer end located on the side of said closure part remote from said spinning chamber for discharging the spun yarn, the cross section of said outlet channel in said outlet tube gradually increasing in the direction from said inner end to said outer end.

References Cited UNITED STATES PATENTS 3,115,001 12/1963 Cizek et al 5758.91 3,119,223 1/1964 Meinberg 5758.95 XR 3,121,306 2/1964 Cizek et a1. 5758.89 3,324,642 6/1967 Meinberg et al 5758.95 3,328,949 7/1967 Pavek et a1. 5758.89

FOREIGN PATENTS 969,046 9/ 1964 Great Britain.

1,033,074 6/1966 Great Britain.

FRANK I. COHEN, Primary Examiner.

D. WATKINS, Assistant Examiner. 

1. A SPINNING DEVICE COMPRISING, IN COMBINATION, A ROTARY SPINNING CHAMBER HAVING AN AXIS OF ROTATION AND AN APERTURE; AND STATIONARY MEANS INCLUDING A CLOSURE PART CLOSING SAID APERTURE, AND A SEPARATOR PART LOCATED IN SAID SPINNING CHAMBER, SAID CLOSURE PART AND SAID SEPARATOR PART HAVING CONFRONTING SURFACES FORMING A GAP OUTWARDLY WIDENING IN RADIAL DIRECTION, SAID STATIONARY MEANS BEING FORMED WITH AN INLET CHANNEL HAVING AN INLET OPENING IN SAID GAP ON SAID CONFRONTING SURFACE OF SAID CLOSURE PART, AND WITH AN OUTLET PASSAGE FOR YARN SPUN IN SAID SPINNING CHAMBER HAVING AN OUTLET OPENING FOR SPUN YARN LOCATED IN SAID AXIS OF ROTATION AND IN SAID SPINNING CHAMBER. 